US20100102091A1 - Barrier piston with seal - Google Patents
Barrier piston with seal Download PDFInfo
- Publication number
- US20100102091A1 US20100102091A1 US12/257,497 US25749708A US2010102091A1 US 20100102091 A1 US20100102091 A1 US 20100102091A1 US 25749708 A US25749708 A US 25749708A US 2010102091 A1 US2010102091 A1 US 2010102091A1
- Authority
- US
- United States
- Prior art keywords
- piston
- piston body
- barrier
- seal
- durometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000004888 barrier function Effects 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 47
- 239000003381 stabilizer Substances 0.000 claims abstract description 35
- 239000000443 aerosol Substances 0.000 claims abstract description 31
- 239000003380 propellant Substances 0.000 claims abstract description 28
- 238000001746 injection moulding Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 8
- 239000012815 thermoplastic material Substances 0.000 claims description 5
- 239000012263 liquid product Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims 1
- 239000000806 elastomer Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 23
- 239000007789 gas Substances 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000012855 volatile organic compound Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 241000238631 Hexapoda Species 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002386 air freshener Substances 0.000 description 1
- HOWJQLVNDUGZBI-UHFFFAOYSA-N butane;propane Chemical compound CCC.CCCC HOWJQLVNDUGZBI-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003630 growth substance Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/60—Contents and propellant separated
- B65D83/64—Contents and propellant separated by piston
Abstract
Description
- The present disclosure relates to aerosol containers, and more particularly, relates to a barrier piston with an integrated seal of low durometer to ensure separation of the product and propellant within such aerosol containers.
- Aerosol containers have been commonly used to dispense personal, household, industrial, and medical products, and to provide a low cost, easy to use method of dispensing a product. Typically, aerosol containers include a product to be dispensed and a propellant used to discharge the product from the container. The propellant is under pressure and provides a force to expel the product when a user actuates the aerosol container.
- More specifically, the product to be dispensed can include volatile actives such as fragrances, sanitizers, cleaners, waxes or other surface treatments, deodorizers and or insect control agents such as repellents, insecticides, or growth regulators. One or more chemicals to be dispensed are usually mixed in a solvent and, in any event, are mixed with the propellant. Typical propellants are compressed air or other compressed gases, carbon dioxide, a selected hydrocarbon gas, or mixtures of hydrocarbon gases, such as a propane-butane mix. The mixture is then sprayed out of the container by manually pushing down or sideways on an actuator button, lever, or other structure that controls a valve assembly mounted at the top of the container.
- The two main types of propellants used in aerosol containers today are liquefied gas propellants, such as hydrocarbon and hydrofluorocarbon (HFC) propellants, and compressed gas propellants, such as compressed carbon dioxide or nitrogen gas. To a lesser extent, chlorofluorocarbon propellants (CFCs) are also used. The use of CFCs is, however, being phased out due to the harmful effects of CFCs on the environment. Hydrocarbon propellants contain Volatile Organic Compounds (VOCs). The content of VOCs in aerosol air fresheners is an unwanted byproduct and is consequently regulated by various federal and state regulatory agencies, such as the Environmental Protection Agency (EPA) and California Air Resource Board (CARB).
- One way in which to reduce the VOC content released by aerosol containers is to reduce the content of the hydrocarbon propellant used to dispense the liquid product. However, a reduction in the propellant content adversely affects the product performance. Specifically, reducing the propellant content results in excessive amounts of the product remaining in the container at the end of the life of the dispenser assembly, and an increase in the size of particles of the dispensed product.
- In other solutions, a piston is slidably sealed within the container and in between the product and the propellant so as to seal in the propellant. As the product is dispensed, the piston maintains pressure on the product and prevents release of the propellant by translating longitudinally within the container in contact with the inner wall of the container. For proper operation, the piston must form and maintain an effective seal with the inner wall of the container. If the piston fails to seal, the product to be dispensed may leak into the propellant. This leakage reduces the amount of product which can be dispensed. Moreover, for certain types of products and propellants, the leaked product may spoil. Additionally, when the piston seal fails, the propellant may leak into the product, which is known as blow by, and may also create problems.
- Furthermore, discontinuities in the inner wall of a container make it difficult to maintain an effective seal between the piston and the side wall. Discontinuities can be either consistent, for example a seam, or random, for example a dent. Such discontinuities can cause the seal to fail or the piston to bind, or both. The likelihood of either seal failure or piston binding is dependent on both the longitudinal and radial rigidity of the piston. That is, a piston having a high radial rigidity is likely to leak or bind when it encounters a discontinuity. A piston having a high longitudinal rigidity is likely to bind when it encounters a discontinuity.
- Existing piston designs incorporate a flexible skirt to provide an effective seal for an aerosol container. Accordingly, a common piston configuration is a one-piece molded plastic piston having a face portion and a flexible skirt for sealingly engaging the inner wall of the aerosol container. The plastic piston may also be manufactured by thermoforming, casting, pressing, extrusion, or any other process for manufacturing plastics. The longitudinal and radial rigidity of the piston are generally determined by the length and the thickness of the plastic skirt. One-piece molding or any other process of forming the piston, however, inherently limits how thin the skirt can be made. If the skirt is made too thin, molten plastic will not consistently and evenly fill the mold. If the skirt is made too thick, the piston will leak or bind.
- Therefore, multiple needs exist for an improved aerosol container that minimizes the release of pollutants while performing efficiently and consistently throughout the life of the aerosol container. More specifically, needs exist for a barrier piston that isolates the product from the propellant, provides stability within the container, and conforms to variations in the container while using the pressurized propellant to discharge the product. Furthermore, needs exist for a more efficient method of molding such a barrier piston with an integrated seal.
- In accordance with one aspect of the disclosure, a barrier piston for an aerosol container is provided which comprises a piston body including a base, the piston body formed of a first material with a first durometer; and a seal molded onto the base of the piston body, the seal formed of a second material with a second durometer, the second durometer being less than the first durometer.
- In accordance with another aspect of the disclosure, a barrier piston for an aerosol container is provided which comprises a piston body including a base and flow channels disposed thereon, the piston body formed of a first material with a first durometer; stabilizers formed of a second material with a second durometer disposed on the flow channels; and a seal formed of the second material radially disposed on the base of the piston body.
- In accordance with another aspect of the disclosure, an aerosol container assembly is provided which comprises a container; a valve assembly disposed on a top of the container; a stopper sealed to a bottom of the container; and a barrier piston comprising a piston body with a base and flow channels disposed thereon, stabilizers disposed on the flow channels, and a seal radially disposed on the base, the barrier piston slidably disposed in an interior of the container between the valve assembly and the stopper, the valve assembly and the barrier piston defining a first chamber, the barrier piston and the stopper defining a second chamber.
- In accordance with another aspect of the disclosure, a method of manufacturing a barrier piston with a seal is provided which comprises the steps of placing a mold core into a first cavity; injection molding a first material of a first durometer between the mold core and the first cavity to form a piston body having flow channels; removing the mold core and the piston body from the first cavity; placing the mold core and the piston body into a second cavity; injection molding a second material of a second durometer between the piston body and the second cavity to overmold stabilizers and a seal onto the piston body; removing the mold core and the piston body from the second cavity; and ejecting the piston body from the mold core.
- These and other aspects of this disclosure will become more readily apparent upon reading the following detailed description when taken in conjunction with the accompanying drawings.
-
FIG. 1A is a sectional side view of an aerosol container using an exemplary barrier piston constructed in accordance with the teachings of the disclosure; -
FIG. 1B is a perspective view of the barrier piston ofFIG. 1A ; -
FIG. 2A is a perspective view of the piston body of the barrier piston ofFIGS. 1A and 1B ; -
FIG. 2B is a perspective view of the seal and stabilizers of the barrier piston ofFIGS. 1A and 1B ; -
FIG. 3A is a perspective view of another exemplary barrier piston; -
FIG. 3B is a side view of the barrier piston ofFIG. 3A ; -
FIG. 3C is a top view of the barrier piston ofFIG. 3A ; -
FIG. 3D is a sectional view along line D-D ofFIG. 3C ; -
FIG. 4A is a perspective view of another exemplary barrier piston; -
FIG. 4B is perspective view of the bottom of the barrier piston ofFIG. 4A ; -
FIG. 4C is top view of the barrier piston ofFIG. 4A ; -
FIG. 4D is a sectional view along line D-D ofFIG. 4C ; -
FIG. 4E is another sectional view along line E-E ofFIG. 4C ; and -
FIG. 4F is a magnified view of the cutout F ofFIG. 4E . - While the present disclosure is susceptible to various modifications and alternative constructions, certain illustrative embodiments thereof have been shown in the drawings and will be described below in detail. It should be understood, however, that there is no intention to limit the present invention to the specific forms disclosed, but on the contrary, the intention is to cover all modifications, alternative constructions, and equivalents falling with the spirit and scope of the present invention.
- Referring now to the drawings and with particular references to
FIGS. 1A and 1B , an exemplary aerosol container and a barrier piston for use with an aerosol container are referred to asreference numbers - One example of an aerosol container that may use a barrier piston to dispense liquid products is shown in
FIG. 1A . Theaerosol container 10 may include avalve assembly 12 on the top of thecontainer 10 and astopper 14 sealed to the bottom. Abarrier piston 20 may be slidably disposed between thevalve assembly 12 and thestopper 14 to define afirst chamber 16 and asecond chamber 18. Thefirst chamber 16 may comprise a product to be dispensed while thesecond chamber 18 may comprise a propellant. The product to be dispensed may include actives such as fragrances, sanitizers, cleaners, waxes, deodorizers and or insect control agents. Typical propellants may include compressed gas, liquefied gas, or the like. - The propellant in the
second chamber 18 may be pressurized such that a constant upward force is exerted on thebarrier piston 20. Similarly, pressure in thefirst chamber 16 may exert an opposing force on thebarrier piston 20. Accordingly, thebarrier piston 20 may slidably adjust its longitudinal position within thecontainer 10 until pressure equilibrium has been reached. In use, the product may be discharged from thecontainer 10 by manually actuating a button, switch, latch, lever, or the like, that controls thevalve assembly 12. Upon actuation, pressure may be released from thefirst chamber 16, which may offset the pressure equilibrium. More specifically, the pressure in thesecond chamber 18 may be greater than that of thefirst chamber 16. Accordingly, thebarrier piston 20 may slide toward the top of thecontainer 10 until pressure equilibrium between the first andsecond chambers - As shown in more detail in
FIG. 1B , thebarrier piston 20 may include apiston body 22 with additional features that ensure a consistent seal between the first andsecond chambers seal 24 may be radially disposed, or molded, on a base of thepiston body 22 to seal any gap that may exist between thepiston body 22 and the inner walls of thecontainer 10. Thepiston body 22 may be made of a first material while theseal 24 may be made of a second material of low durometer, such that an effective seal is maintained between thepiston body 22 and any discontinuities that may exist along the inner wall of thecontainer 10. In certain embodiments, thepiston body 22 may be a thermoplastic material while theseal 24 may be a thermoplastic elastomer material. Additionally, other comparative materials may be used to form thepiston body 22 and theseal 24. - The
barrier piston 20 ofFIG. 1B may further includeflow channels 28 through which a set ofstabilizers 26 may traverse the surface of thepiston body 22. In the depicted embodiment, four stabilizers and flow channels are shown but alternatively, fewer or a greater number ofstabilizers 26 andflow channels 28 may be distributed on thebarrier piston 20.Flow channels 28 may be formed on thepiston body 22 in the form of grooves, paths, or the like, and facilitate overmolding of aseal 24 andstabilizers 26 onto thepiston body 22. Additionally, flowchannels 28 may frictionally hold theseal 24 and thestabilizers 26 firmly in place. For instance,stabilizers 26 may be at least partially embedded or molded into theflow channels 28. In alternate embodiments, thestabilizers 26 may be integrated into thepiston body 22, completely external to thepiston body 22, or any combination thereof. - Referring back to
FIG. 1A ,stabilizers 26 help thepiston body 22 maintain axial alignment within thecontainer 10 during longitudinal movements. Alignment strips 30 may also be disposed on a surface of thepiston body 22 to provide more axial stability. To further prevent tilting or binding of thepiston body 22 within thecontainer 10 in the presence of discontinuities, thestabilizers 26 may be made of a low durometer material, for example, thermoplastic elastomer. Thermoplastic elastomer material may provide thestabilizers 26 with enough flexibility to compensate for dents and or other discontinuities that may exist along the inner walls of thecontainer 10. - Referring now to
FIGS. 2A and 2B , individually molded components of thebarrier piston 20 ofFIG. 1B are provided. As described above, the completedbarrier piston 20 may comprise more than one material, and accordingly, manufacture of thebarrier piston 20 may include a multi-step injection molding or overmolding process. More specifically, a two-step injection molding process may be used to mold thepiston body 22 using a first material, and to mold the combination of theseal 24 and thestabilizers 26 using a second material of low durometer. Alternatively, additional steps may be employed for molding barrier pistons comprising additional materials. - Manufacture of the
barrier piston 20 may include the following two-step injection molding process. First, a mold core may be placed into a first cavity for forming thepiston body 22 ofFIG. 2A havingflow channels 28 and alignment strips 30. A first material, for example a thermoplastic, may be injection molded between the mold core and the first cavity. The mold core and thepiston body 22 may then be removed from the first cavity. Next, the mold core and thepiston body 22 may be placed into a second cavity for overmolding theseal 24 and thestabilizers 26 ofFIG. 2B onto thepiston body 22. A second material of low durometer, for example a thermoplastic elastomer, may be injection molded between the mold core and the second cavity. Subsequently, the mold core and the completedbarrier piston 10 may be removed from the second cavity. Finally, the completedbarrier piston 20 may be ejected from the mold core. - Referring now to
FIGS. 3A-3D , views of anotherexemplary barrier piston 20 a is provided. As with the previous embodiment, apiston body 22 a may be provided withflow channels 28 a and alignment strips 30 a. Furthermore, aseal 24 a and a set ofstabilizers 26 a of a low durometer material may be disposed on thepiston body 22 a. In contrast to theseal 24 ofFIGS. 1B and 2B , theseal 24 a ofFIGS. 3A and 3B may further comprise arib 25 a. Alternatively, theseal 24 a may include a plurality ofsmaller ribs 25 a. - Referring now to
FIGS. 4A-4F , views of yet anotherexemplary barrier piston 20 b is provided. As with previous embodiments, thepiston body 22 b may be provided withflow channels 28 b andstabilizers 26 b disposed thereon. Aseal 24 b may also be radially disposed on the bottom or base of thepiston body 22 b. In contrast to thebarrier pistons piston body 22 b may be formed without alignment strips. Accordingly, thestabilizers 26 b may includeextensions 27 b that are longitudinally flush with theseal 24 b to compensate for the absent alignment strips. Using thestabilizers 26 b andextensions 27 b as guides, thebarrier piston 20 b may be able to maintain axial alignment within an aerosol container. More specifically, theextensions 27 b of a low durometer material may prevent tilting and binding of thebarrier piston 20 b within an aerosol container in the presence of dents and or other discontinuities. - Manufacture of the
barrier pistons FIGS. 3A-3D , theseal 24 a may be injection molded to include therib 25 a. For manufacturing the embodiment ofFIGS. 4A-4F , thepiston body 22 b may be injection molded without alignment strips, and thestabilizers 26 b may be injection molded to include theextensions 27 b described above. Similar modifications to the injection molding process may be applied for molding any additional features to the barrier piston design. - Based on the foregoing, it can be seen that the present disclosure provides a barrier piston with features that ensure separation of the product and propellant. A seal and a set of stabilizers of a low durometer material prevent tilting and binding of the piston body in the presence of discontinuities within the walls of an aerosol container. Moreover, the stabilizers preserve the position and alignment of the seal on the base of the piston body. Furthermore, a preferred method of overmolding the seal and stabilizers of a low durometer material upon a piston body with flow channels is provided. The overmolding process provides a supported seal while also facilitating manufacture of the barrier piston.
- While only certain embodiments have been set forth, alternatives and modifications will be apparent from the above description to those skilled in the art. These and other alternatives are considered equivalents and within the spirit and scope of this disclosure.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/257,497 US8245888B2 (en) | 2008-10-24 | 2008-10-24 | Barrier piston with seal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/257,497 US8245888B2 (en) | 2008-10-24 | 2008-10-24 | Barrier piston with seal |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100102091A1 true US20100102091A1 (en) | 2010-04-29 |
US8245888B2 US8245888B2 (en) | 2012-08-21 |
Family
ID=42116507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/257,497 Active 2030-08-25 US8245888B2 (en) | 2008-10-24 | 2008-10-24 | Barrier piston with seal |
Country Status (1)
Country | Link |
---|---|
US (1) | US8245888B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014059023A1 (en) | 2012-10-09 | 2014-04-17 | Cvent, Inc. | Providing activity feed for events to facilitate gathering and communicating of event information |
US20160102727A1 (en) * | 2014-10-13 | 2016-04-14 | Continental Automotive Systems, Inc. | Air spring piston with integrated sealing |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH700392B1 (en) * | 2009-02-06 | 2012-12-31 | Gerhard Obrist | Delivery device for the metered delivery of a liquid formulation and method for producing the dispensing device. |
US10604332B2 (en) | 2013-10-23 | 2020-03-31 | The Procter & Gamble Company | Aerosol container having valve cup with integral bag |
US10301104B2 (en) | 2015-06-18 | 2019-05-28 | The Procter & Gamble Company | Piston aerosol dispenser |
US9975656B2 (en) | 2015-06-18 | 2018-05-22 | The Procter & Gamble Company | Method of manufacturing a piston aerosol dispenser |
US10661974B2 (en) | 2016-08-12 | 2020-05-26 | The Procter & Gamble Company | Internally fitted aerosol dispenser |
EP3565627A4 (en) | 2017-01-04 | 2021-01-13 | Reflex Medical Corporation | Metered dose topical applicator |
USD848611S1 (en) | 2018-01-24 | 2019-05-14 | Reflex Medical Corp. | Metered dose topical applicator |
CN113329953B (en) * | 2018-11-23 | 2023-04-28 | 阿鲁艾尔有限公司 | Dispenser container, dispenser and method of manufacturing a dispenser container |
Citations (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3388638A (en) * | 1966-03-02 | 1968-06-18 | Ross Operating Valve Co | Piston |
US3433134A (en) * | 1967-11-22 | 1969-03-18 | Colgate Palmolive Co | Piston for aerosol dispensers |
US3827607A (en) * | 1971-08-26 | 1974-08-06 | Eyelet Specialty Co | Pressure operated container for dispensing viscous products |
US3901416A (en) * | 1971-08-26 | 1975-08-26 | Robert S Schultz | Top-loaded pressure operated container for dispensing viscous products |
US4023717A (en) * | 1974-04-09 | 1977-05-17 | Schultz Robert S | Pressure-operated container for viscous products |
US4106674A (en) * | 1975-09-24 | 1978-08-15 | Schultz Robert S | Pressure-operated container for viscous products |
US4109833A (en) * | 1976-12-17 | 1978-08-29 | Gross Jerome A | Piston for pressure dispensers of the barrier piston type |
US4171757A (en) * | 1976-06-08 | 1979-10-23 | Diamond George B | Pressurized barrier pack |
US4214507A (en) * | 1977-08-24 | 1980-07-29 | Vries Donald S Jr De | One-piece plastic piston |
US4234108A (en) * | 1977-11-25 | 1980-11-18 | Diamond George B | Piston for aerosol container |
US4402427A (en) * | 1981-07-22 | 1983-09-06 | The Procter & Gamble Company | Cartridge piston with integrally molded sealing plug |
US4506810A (en) * | 1981-07-21 | 1985-03-26 | L'oreal | Dosage dispenser device |
US4562942A (en) * | 1984-07-03 | 1986-01-07 | Diamond George B | Rolling diaphragm barrier for pressurized container |
US4641765A (en) * | 1984-10-05 | 1987-02-10 | Diamond George B | Expandable pressurized barrier container |
US4645098A (en) * | 1984-02-16 | 1987-02-24 | Hilti Aktiengesellschaft | Press-out piston for dispensing substance from a container |
US4703875A (en) * | 1986-07-24 | 1987-11-03 | S. C. Johnson & Son, Inc. | Low mass piston for aerosol container |
US4834347A (en) * | 1988-04-20 | 1989-05-30 | Grazina J. Pauliukonis | Positioner with large diameter piston rod and fluted volume-compensating piston |
US4913323A (en) * | 1986-09-29 | 1990-04-03 | Schneindel Associates, Inc. | Stepped piston for pressure operated dispensing container |
US5065900A (en) * | 1990-01-12 | 1991-11-19 | Scheindel Christian T | Barrier can prefill seal |
US5127556A (en) * | 1991-07-17 | 1992-07-07 | United States Can Company | Low mass piston system for necked-in aerosol cans |
US5165577A (en) * | 1991-05-20 | 1992-11-24 | Heiner Ophardt | Disposable plastic liquid pump |
US5282552A (en) * | 1991-05-20 | 1994-02-01 | Hygiene-Technik Inc. | Disposable plastic liquid pump |
US5392962A (en) * | 1992-12-31 | 1995-02-28 | Meshberg; Philip | Atomizing pump |
US5419466A (en) * | 1992-09-04 | 1995-05-30 | Scheindel; Christian T. | Bowed piston for a pressure operated container |
US5441181A (en) * | 1994-08-09 | 1995-08-15 | Scheindel; Christian T. | Piston with a flexible wipe |
US5577641A (en) * | 1993-06-04 | 1996-11-26 | L'oreal | Dispensing assembly comprising a cylindrical container including a piston |
US5702736A (en) * | 1994-06-20 | 1997-12-30 | Itt Automotive Europe Gmbh | Assembly for manufacturing a piston from plastic material |
US5850948A (en) * | 1996-09-13 | 1998-12-22 | Valois S.A. | Finger-operable pump with piston biasing post |
US5902276A (en) * | 1996-11-26 | 1999-05-11 | Liebel-Flarsheim Company | Two-shot molded plunger |
US5975360A (en) * | 1991-05-20 | 1999-11-02 | Ophardt; Heiner | Capped piston pump |
US6325254B1 (en) * | 1999-03-01 | 2001-12-04 | Dispensing Containers Corporation | Fluorine surface treating of a barrier piston |
US6343713B1 (en) * | 1993-06-29 | 2002-02-05 | Robert Henry Abplanalp | Flexible barrier member useful in aerosol dispensers |
US6371338B1 (en) * | 1999-08-06 | 2002-04-16 | Hilti Aktiengesellschaft | Valve arrangement for discharging a fluid medium maintained under pressure in a container |
US20020056368A1 (en) * | 1998-10-14 | 2002-05-16 | Ewald May | Piston with pressure-dependent sealing effect for a piston-cylinder arrangement ,especially a shock absorber piston |
US20020162450A1 (en) * | 2001-05-04 | 2002-11-07 | Afm Incorporated | Piston with seal |
US20030019888A1 (en) * | 2001-07-23 | 2003-01-30 | Gupta Pradeep Yohanne | Piston for dispensing device, dispensing device, product containing dispensing device, method of filling, and method of dispensing |
US20030071080A1 (en) * | 2001-09-10 | 2003-04-17 | Jean-Pierre Yquel | Variable flow rate valve and container equipped therewith |
US20030102328A1 (en) * | 2001-11-30 | 2003-06-05 | Precision Valve Corporation | Aerosol valve assembly |
US6595449B2 (en) * | 2001-10-09 | 2003-07-22 | Shimano Inc. | Fishing line guiding mechanism for spinning reel |
USRE38207E1 (en) * | 1998-01-23 | 2003-08-05 | L'oreal | Valve with outlet flow rate regulation, and container equipped with such a valve |
US6651850B2 (en) * | 1993-06-29 | 2003-11-25 | Robert Henry Abplanalp | Flexible barrier member useful in aerosol dispensers |
US20040134929A1 (en) * | 2003-01-15 | 2004-07-15 | Scheindel Christian T. | Piston for pressurized container |
US20050242118A1 (en) * | 2002-06-18 | 2005-11-03 | Van Der Heijden Edgar I M | Dispensing unit |
US20060162807A1 (en) * | 2005-01-21 | 2006-07-27 | United States Can Company | Grommet or fill valve for an aerosol container |
US20080041885A1 (en) * | 2006-07-03 | 2008-02-21 | Nordson Corporation | Dispenser and piston for dispensing a liquid material and method of making a piston |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3595449A (en) | 1969-10-13 | 1971-07-27 | Clevepak Corp | Dispensing container with follower discharge assistant |
-
2008
- 2008-10-24 US US12/257,497 patent/US8245888B2/en active Active
Patent Citations (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3388638A (en) * | 1966-03-02 | 1968-06-18 | Ross Operating Valve Co | Piston |
US3433134A (en) * | 1967-11-22 | 1969-03-18 | Colgate Palmolive Co | Piston for aerosol dispensers |
US3827607A (en) * | 1971-08-26 | 1974-08-06 | Eyelet Specialty Co | Pressure operated container for dispensing viscous products |
US3901416A (en) * | 1971-08-26 | 1975-08-26 | Robert S Schultz | Top-loaded pressure operated container for dispensing viscous products |
US4023717A (en) * | 1974-04-09 | 1977-05-17 | Schultz Robert S | Pressure-operated container for viscous products |
US4106674A (en) * | 1975-09-24 | 1978-08-15 | Schultz Robert S | Pressure-operated container for viscous products |
US4171757A (en) * | 1976-06-08 | 1979-10-23 | Diamond George B | Pressurized barrier pack |
US4109833A (en) * | 1976-12-17 | 1978-08-29 | Gross Jerome A | Piston for pressure dispensers of the barrier piston type |
US4214507A (en) * | 1977-08-24 | 1980-07-29 | Vries Donald S Jr De | One-piece plastic piston |
US4234108A (en) * | 1977-11-25 | 1980-11-18 | Diamond George B | Piston for aerosol container |
US4506810A (en) * | 1981-07-21 | 1985-03-26 | L'oreal | Dosage dispenser device |
US4402427A (en) * | 1981-07-22 | 1983-09-06 | The Procter & Gamble Company | Cartridge piston with integrally molded sealing plug |
US4645098A (en) * | 1984-02-16 | 1987-02-24 | Hilti Aktiengesellschaft | Press-out piston for dispensing substance from a container |
US4562942A (en) * | 1984-07-03 | 1986-01-07 | Diamond George B | Rolling diaphragm barrier for pressurized container |
US4641765A (en) * | 1984-10-05 | 1987-02-10 | Diamond George B | Expandable pressurized barrier container |
US4703875A (en) * | 1986-07-24 | 1987-11-03 | S. C. Johnson & Son, Inc. | Low mass piston for aerosol container |
US4913323A (en) * | 1986-09-29 | 1990-04-03 | Schneindel Associates, Inc. | Stepped piston for pressure operated dispensing container |
US4834347A (en) * | 1988-04-20 | 1989-05-30 | Grazina J. Pauliukonis | Positioner with large diameter piston rod and fluted volume-compensating piston |
US5065900A (en) * | 1990-01-12 | 1991-11-19 | Scheindel Christian T | Barrier can prefill seal |
US5165577A (en) * | 1991-05-20 | 1992-11-24 | Heiner Ophardt | Disposable plastic liquid pump |
US5282552A (en) * | 1991-05-20 | 1994-02-01 | Hygiene-Technik Inc. | Disposable plastic liquid pump |
US5975360A (en) * | 1991-05-20 | 1999-11-02 | Ophardt; Heiner | Capped piston pump |
US5127556A (en) * | 1991-07-17 | 1992-07-07 | United States Can Company | Low mass piston system for necked-in aerosol cans |
US5419466A (en) * | 1992-09-04 | 1995-05-30 | Scheindel; Christian T. | Bowed piston for a pressure operated container |
US5392962A (en) * | 1992-12-31 | 1995-02-28 | Meshberg; Philip | Atomizing pump |
US5577641A (en) * | 1993-06-04 | 1996-11-26 | L'oreal | Dispensing assembly comprising a cylindrical container including a piston |
US6343713B1 (en) * | 1993-06-29 | 2002-02-05 | Robert Henry Abplanalp | Flexible barrier member useful in aerosol dispensers |
US6651850B2 (en) * | 1993-06-29 | 2003-11-25 | Robert Henry Abplanalp | Flexible barrier member useful in aerosol dispensers |
US5702736A (en) * | 1994-06-20 | 1997-12-30 | Itt Automotive Europe Gmbh | Assembly for manufacturing a piston from plastic material |
US5441181A (en) * | 1994-08-09 | 1995-08-15 | Scheindel; Christian T. | Piston with a flexible wipe |
US5850948A (en) * | 1996-09-13 | 1998-12-22 | Valois S.A. | Finger-operable pump with piston biasing post |
US5902276A (en) * | 1996-11-26 | 1999-05-11 | Liebel-Flarsheim Company | Two-shot molded plunger |
USRE38207E1 (en) * | 1998-01-23 | 2003-08-05 | L'oreal | Valve with outlet flow rate regulation, and container equipped with such a valve |
US20020056368A1 (en) * | 1998-10-14 | 2002-05-16 | Ewald May | Piston with pressure-dependent sealing effect for a piston-cylinder arrangement ,especially a shock absorber piston |
US6325254B1 (en) * | 1999-03-01 | 2001-12-04 | Dispensing Containers Corporation | Fluorine surface treating of a barrier piston |
US6371338B1 (en) * | 1999-08-06 | 2002-04-16 | Hilti Aktiengesellschaft | Valve arrangement for discharging a fluid medium maintained under pressure in a container |
US20020162450A1 (en) * | 2001-05-04 | 2002-11-07 | Afm Incorporated | Piston with seal |
US20030019888A1 (en) * | 2001-07-23 | 2003-01-30 | Gupta Pradeep Yohanne | Piston for dispensing device, dispensing device, product containing dispensing device, method of filling, and method of dispensing |
US20040016777A1 (en) * | 2001-07-23 | 2004-01-29 | Gupta Pradeep Yohanne | Piston for dispensing device, dispensing device, product containing dispensing device, method of filling, and method of dispensing |
US6745920B2 (en) * | 2001-07-23 | 2004-06-08 | Pradeep Yohanne Gupta | Piston for dispensing device, dispensing device, product containing dispensing device, method of filling, and method of dispensing |
US20030071080A1 (en) * | 2001-09-10 | 2003-04-17 | Jean-Pierre Yquel | Variable flow rate valve and container equipped therewith |
US6595449B2 (en) * | 2001-10-09 | 2003-07-22 | Shimano Inc. | Fishing line guiding mechanism for spinning reel |
US20030102328A1 (en) * | 2001-11-30 | 2003-06-05 | Precision Valve Corporation | Aerosol valve assembly |
US20050242118A1 (en) * | 2002-06-18 | 2005-11-03 | Van Der Heijden Edgar I M | Dispensing unit |
US20040134929A1 (en) * | 2003-01-15 | 2004-07-15 | Scheindel Christian T. | Piston for pressurized container |
US20060162807A1 (en) * | 2005-01-21 | 2006-07-27 | United States Can Company | Grommet or fill valve for an aerosol container |
US20080041885A1 (en) * | 2006-07-03 | 2008-02-21 | Nordson Corporation | Dispenser and piston for dispensing a liquid material and method of making a piston |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014059023A1 (en) | 2012-10-09 | 2014-04-17 | Cvent, Inc. | Providing activity feed for events to facilitate gathering and communicating of event information |
US20160102727A1 (en) * | 2014-10-13 | 2016-04-14 | Continental Automotive Systems, Inc. | Air spring piston with integrated sealing |
US9895777B2 (en) * | 2014-10-13 | 2018-02-20 | Continental Automotive Systems, Inc. | Air spring piston with integrated sealing |
Also Published As
Publication number | Publication date |
---|---|
US8245888B2 (en) | 2012-08-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8245888B2 (en) | Barrier piston with seal | |
CN109071096B (en) | Cap assembly | |
AU766841B2 (en) | Metering valve for dispensers | |
US6464108B2 (en) | Container assembly for dispensing non-atomized composition mixed internally upon dispensing | |
US7959041B2 (en) | Valve assembly for pressurized dispensers | |
US6464111B2 (en) | Dispenser containing a product and dispensing method | |
JP6215308B2 (en) | Device for packaging / dispensing fluid products with manual pump | |
WO2020046934A1 (en) | Trigger overcap assembly | |
CN110465421B (en) | Dispenser with reservoir comprising separator or porous material | |
JP4406424B2 (en) | Fluid product spraying equipment | |
US11892084B2 (en) | Valve assembly for dispensers | |
US11674615B2 (en) | Valve assembly for dispensers | |
WO2021022279A1 (en) | A valve assembly for dispensers | |
RU2005141549A (en) | AEROSOL PRODUCT CONTAINING A TANK IN WHICH AEROSOLIC COMPOSITION INCLUDING A MACROLIDE COMPOUND IS INCLUDED | |
US11703130B2 (en) | Valve assembly for dispensers | |
US11674601B2 (en) | Valve assembly for dispensers | |
US20100275912A1 (en) | aerosol device | |
JP4906483B2 (en) | Container for liquid | |
ITMI20060423A1 (en) | PUMP TO ALLOW THE MANUAL DELIVERY OF A FLUID SEALED SUBSTANCE IN A CONTAINER | |
GB2494274A (en) | Normally-Closed Valve with Elastomeric Spring | |
JPH06298270A (en) | Separator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: S.C. JOHNSON & SON, INC., WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ANDERSEN, DANIEL A.;BROWN, LAWRENCE M.;REEL/FRAME:028325/0919 Effective date: 20081021 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 12 |